SOLUTION: On your first four tests you scored 80%,76%,99% and 91%. What do you have to get on the final test to average at least an 80% for the course?

SOLUTION: On your first four tests you scored 80%,76%,99% and 91%. What do you have to get on the final test to average at least an 80% for the course?

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Question 367014: On your first four tests you scored 80%,76%,99% and 91%. What do you have to get on the final test to average at least an 80% for the course?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Let X be the final test score,

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